Angular multiplexing type holographic data storage system,

摘要

PURPOSE: An angular multiplexing type hologram data storage system is provided to improve the record density by precisely controlling an angle adjustment. CONSTITUTION: The angular multiplexing type hologram data storage system comprises: a beam splitter(20) for splitting a laser beam(11) generated from a laser(10) into a reference beam(12) and an object beam(13); and a piezoelectric optical displacement component(110) disposed at a path of the reference beam of a hologram record medium(60) for recording hologram image, for changing a progressive angle of the reference beam(12) by use of a displacement slope which is made by a voltage slope of a piezoelectric component(110), wherein the piezoelectric optical displacement component(110) has negative and positive electrodes(120, 121) for applying a voltage to both sides of the piezoelectric component(110); and wherein the electrodes(120, 121) is configured so that a voltage slope is declined toward an inclined plane from an inside straight plane.